package org.jeecg.weixin.common.util.http.okhttp;

import lombok.extern.slf4j.Slf4j;
import org.jeecg.weixin.common.enums.WxType;
import org.jeecg.weixin.common.error.WxError;
import org.jeecg.weixin.common.error.WxErrorException;
import org.jeecg.weixin.common.util.http.BaseMediaDownloadRequestExecutor;
import org.jeecg.weixin.common.util.http.HttpResponseProxy;
import org.jeecg.weixin.common.util.http.RequestHttp;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okio.BufferedSink;
import okio.Okio;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;

import java.io.File;
import java.io.IOException;

/**
 * .
 * 
 * @author ecoolper
 * @date 2017/5/5
 */
@Slf4j
public class OkHttpMediaDownloadRequestExecutor
		extends BaseMediaDownloadRequestExecutor<OkHttpClient, OkHttpProxyInfo> {
	public OkHttpMediaDownloadRequestExecutor(RequestHttp requestHttp, File tmpDirFile) {
		super(requestHttp, tmpDirFile);
	}

	@Override
	public File execute(String uri, String queryParam, WxType wxType) throws WxErrorException, IOException {
		if (queryParam != null) {
			if (uri.indexOf('?') == -1) {
				uri += '?';
			}
			uri += uri.endsWith("?") ? queryParam : '&' + queryParam;
		}

		// 得到httpClient
		OkHttpClient client = requestHttp.getRequestHttpClient();

		Request request = new Request.Builder().url(uri).get().build();

		Response response = client.newCall(request).execute();

		String contentType = response.header("Content-Type");
		if (contentType != null && contentType.startsWith("application/json")) {
			// application/json; encoding=utf-8 下载媒体文件出错
			throw new WxErrorException(WxError.fromJson(response.body().string(), wxType));
		}

		String fileName = new HttpResponseProxy(response).getFileName();
		if (StringUtils.isBlank(fileName)) {
			return null;
		}

		String baseName = FilenameUtils.getBaseName(fileName);
		if (StringUtils.isBlank(fileName) || baseName.length() < 3) {
			baseName = String.valueOf(System.currentTimeMillis());
		}

		File file = File.createTempFile(baseName, "." + FilenameUtils.getExtension(fileName), super.tmpDirFile);

		try (BufferedSink sink = Okio.buffer(Okio.sink(file))) {
			sink.writeAll(response.body().source());
		}

		file.deleteOnExit();
		return file;
	}

}
